Enrichment mathematics for the grades. 

 - Washington :  The Council,  1963. 
 - Its yearbook ;  27 .
 - Yearbook (National Council of Teachers of Mathematics) ;  27. .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics -- Study and teaching.--Mathematics -- Study and teaching.